1,2

seq(binomial(2^n, n-1), n=1..20);

Sequence in context: A111817 A134048 A091969 this_sequence A120604 A081792 A084594

Adjacent sequences: A101343 A101344 A101345 this_sequence A101347 A101348 A101349

nonn

Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Dec 25 2004