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A076660 Numbers m such that A076644(m) = floor((2/3)*m*(sqrt(m)+1)). 2
1, 2, 6, 17, 24, 26, 29, 43, 83, 88, 193, 207, 243, 357, 534, 806, 1082, 1197, 1377, 2246, 2362, 3148, 4342, 4570, 6463, 11687, 14305, 35681, 41369, 53410, 75292, 98348, 146608, 219393, 246121, 257663, 419767, 476246, 596919, 860060, 912227, 1225215, 2239828, 2727103, 2819396 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Sequence is probably infinite.
LINKS
FORMULA
It seems that a(n) is asymptotic to c*exp(d*n) with d around 0.33...
PROG
(PARI) lista(nn) = {my(v=vector(nn)); v[1] = 1; for (n=2, nn, v[n] = n + v[n-sqrtint(n)]; ); for (m=1, nn, if (v[m] == floor((2/3)*m*(sqrt(m)+1)), print1(m, ", ")); ); } \\ Michel Marcus, Feb 16 2021
CROSSREFS
Cf. A076644.
Sequence in context: A063627 A069014 A105146 * A024310 A064516 A001441
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Oct 24 2002
EXTENSIONS
Incorrect term 4 removed and more terms added from Michel Marcus, Feb 16 2021
STATUS
approved

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Last modified July 17 13:32 EDT 2024. Contains 374377 sequences. (Running on oeis4.)