A083070 First superdiagonal of number array A083064.

1, 5, 43, 469, 6221, 98041, 1797559, 37665881, 888888889, 23343682141, 675462155171, 21356578028941, 732659790696133, 27107717023577009, 1076060070966390511, 45619867383437689201, 2057328526812890853617

Offset: 1

Author

Paul Barry, Apr 21 2003

Keywords

• easy
• nonn

Crossrefs

Cf. A083069, A083071.

Formula

a(n) = ((n-1)*(n+1)^n + 1)/n.