A131938 a(1)=2; a(2)=5. a(n) = a(n-1) + (n-th positive integer which does not occur in sequence A131937).

2, 5, 10, 16, 23, 32, 42, 53, 65, 78, 93, 109, 126, 144, 163, 183, 205, 228, 252, 277, 303, 330, 358, 388, 419, 451, 484, 518, 553, 589, 626, 665, 705, 746, 788, 831, 875, 920, 966, 1013, 1061, 1111, 1162, 1214, 1267, 1321, 1376, 1432, 1489, 1547, 1606, 1666

Offset

1,1

Links

Table of n, a(n) for n=1..52.

Example

A131937: 1,4,8,14,21,29,...
Positive integers not in A131937: 2,3,5,6,7,9,10,11,...
So A131938(8) = A131938(7) + 11 = 53.

Crossrefs

Cf. A131937.

Sequence in context: A323624 A348387 A086849 * A031871 A026056 A267159

Adjacent sequences: A131935 A131936 A131937 * A131939 A131940 A131941

Keyword

nonn

Author

Leroy Quet, Jul 30 2007

Extensions

More terms from Farideh Firoozbakht, Aug 07 2007

a(51)-a(52) from Ray Chandler, Mar 06 2010

Status

approved