0,2

Concerns polynomials P(0,x)=1, 2P(n,x)=(1+x)*[(1+x)^(n-1)+x^(n-1)] . Based on Euler polynomials (may 1993). (Behind 1, -1, 1, -1, 1, -1, 1, -1, 1) 1, -3, 3, -5, 5, -7, 7, 3, -3 are twin numbers, before 1, -2, 2, -1, 1, -4, 4, 13, -13. See Bernoulli twin numbers A051717.

Sequence in context: A004649 A002374 A110560 this_sequence A069902 A085779 A078936

Adjacent sequences: A141421 A141422 A141423 this_sequence A141425 A141426 A141427

sign,uned

Paul Curtz (bpcrz(AT)free.fr), Aug 06 2008