1,3

G. Tollisen and T. Lengyel, A congruential identity ..., Integers 4 (2004), #A4.

(PARI) a(n) = polcoeff(((1+x)^n)%(x^4+1), 2)

Cf. A099586, A099587, A099589.

Sequence in context: A136850 A079248 A083505 this_sequence A099531 A070745 A134535

Adjacent sequences: A099585 A099586 A099587 this_sequence A099589 A099590 A099591

sign

Ralf Stephan, Oct 24 2004