A380251 a(n) is the minimum value, negated, of A377091(k) with k in 0..n.

0, 0, 0, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 8, 8, 8, 8, 9, 10, 11, 12, 12, 12, 12, 12, 12, 13, 14, 15, 16, 17, 18, 18, 18, 18, 18, 18, 19, 20, 21, 22, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 25, 26, 27, 28, 29, 30, 31, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32

Offset

0,4

Links

Rémy Sigrist, Table of n, a(n) for n = 0..10000

Rémy Sigrist, PARI program

Formula

a(n) = -min({A377091(k), k = 0..n}).

Example

The initial terms are:
  n   a(n)  A377091(n)
  --  ----  ----------
   0     0           0
   1     0           1
   2     0           2
   3     2          -2
   4     2          -1
   5     2           3
   6     2           4
   7     2           5
   8     4          -4
   9     4          -3
  10     4           6
  11     4           7
  12     4           8

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A377091, A380250.

Sequence in context: A001306 A260984 A108105 * A321213 A063468 A010336

Adjacent sequences: A380243 A380244 A380250 * A380252 A380253 A380254

Keyword

nonn,new

Author

Rémy Sigrist, Jan 17 2025

Status

approved