New congruences modulo 9 and 27 for Lehmer-Euler numbers are proved, residue periodicity modulo higher powers of 3 is tabulated and conjectured, and a new polynomial sequence is connected to Euler and central factorial numbers.
Ernvall, Generalized Bernoulli numbers, generalized irregular primes, and class number , Ann
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Congruence properties of Lehmer-Euler numbers
New congruences modulo 9 and 27 for Lehmer-Euler numbers are proved, residue periodicity modulo higher powers of 3 is tabulated and conjectured, and a new polynomial sequence is connected to Euler and central factorial numbers.