A347350 Sequence obtained by writing the first 4 integers and skipping 1, then writing the next 5 integers and skipping 2, then writing the next 6 and skipping 3, etc.

1, 2, 3, 4, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 18, 22, 23, 24, 25, 26, 27, 28, 33, 34, 35, 36, 37, 38, 39, 40, 46, 47, 48, 49, 50, 51, 52, 53, 54, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 97, 98, 99, 100, 101, 102, 103, 104, 105

Offset

1,2

Links

Table of n, a(n) for n=1..69.

Ana Rechtman, Août 2021, 4e défi, Images des Mathématiques, CNRS, 2021.

Index entries for sequences generated by sieves

Prog

(PARI) lista(nn) = {my(va=[1..nn], list=List()); my(i=4, j=1, pos=1, ok=1); while (ok, for(m=1, i, if (pos > nn, ok=0, listput(list, va[pos])); pos++; ); pos += j; i++; j++; ); Vec(list); }

Crossrefs

Cf. A004201, A004202, A048859.

Sequence in context: A325031 A364433 A155763 * A030319 A226381 A180040

Adjacent sequences: A347347 A347348 A347349 * A347351 A347352 A347353

Keyword

nonn

Author

Michel Marcus, Aug 28 2021

Status

approved