# A012841 (b-file synthesized from sequence entry) 0 1 1 4 2 20 3 -1024 4 -147568 5 -19148736 6 -2934842560 7 -551525234688 8 -127249126657792 9 -35789287036394496 10 -12158191126869847040 11 -4941201795126314303488 12 -2379230211581147229286400