A062752 Row sums of unsigned N(4) staircase array A062751.

1, 15, 497, 22031, 1124849, 62379535, 3651676657, 222085764623, 13895337519601, 888654458770959, 57831897893972465, 3817410543738148367, 254970980461934291441, 17200148833928765494799

Offset: 0

Author

Wolfdieter Lang, Jul 12 2001

Keywords

• nonn
• easy

Formula

a(n)=N(4; n, -1) with the row polynomials N(4; n, x) defined in A062751.

a(n)=sum(((-1)^(n-j))*2^(3*j+1)*A002293(j), j=1..n)+(-1)^n, with A002293(j)= A062993(j+2, 2)= binomial(4*j, j)/(3*j+1).