A225256 Minimum value unattainable as the sum of 2 attained values of a*b with a,b 0..n integers.

3, 7, 14, 23, 38, 47, 68, 87, 115, 147, 183, 203, 245, 291, 341, 395, 453, 503, 568, 619, 691, 767, 827, 887, 973, 1063, 1157, 1255, 1357, 1463, 1573, 1631, 1747, 1867, 1991, 2119, 2251, 2317, 2455, 2597, 2743, 2893, 3047, 3205, 3367, 3533, 3703, 3791, 3967

Offset

1,1

Comments

Related to A225252.

Links

R. H. Hardin, Table of n, a(n) for n = 1..1000

Prog

(PARI) a(n) = my(v=setbinop((x, y)->x+y, setbinop((x, y)->x*y, [0..n]))); for(k=0, vecmax(v)+1, if (!vecsearch(v, k), return(k))); \\ Michel Marcus, Sep 07 2023

Crossrefs

Cf. A225252, A225253.

Sequence in context: A004232 A140462 A227841 * A093523 A173247 A123386

Adjacent sequences: A225253 A225254 A225255 * A225257 A225258 A225259

Keyword

nonn

Author

R. H. Hardin, May 04 2013

Status

approved