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A331525 a(n) is the least positive k such that A100272(n) - k^2 is a fifth power. 2
1, 2, 4, 6, 3, 10, 9, 14, 15, 8, 20, 14, 16, 24, 20, 26, 22, 27, 26, 3, 5, 13, 15, 36, 34, 23, 40, 27, 33, 44, 37, 51, 54, 45, 56, 18, 58, 24, 53, 63, 55, 57, 64, 66, 36, 69, 42, 63, 74, 75, 73, 82, 84, 66, 86, 90, 93, 92, 31, 94, 35, 78, 99, 49, 84, 100, 97 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
The first terms, alongside A100272(n), are:
n a(n) A100272(n)
-- ---- ----------------
1 1 2 = 1^2 + 1^5
2 2 5 = 2^2 + 1^5
3 4 17 = 4^2 + 1^5
4 6 37 = 6^2 + 1^5
5 3 41 = 3^2 + 2^5
6 10 101 = 10^2 + 1^5
7 9 113 = 9^2 + 2^5
8 14 197 = 14^2 + 1^5
9 15 257 = 15^2 + 2^5
10 8 307 = 8^2 + 3^5
PROG
(PARI) See Links section.
CROSSREFS
See A331435 for similar sequences.
Sequence in context: A362842 A338059 A258105 * A057063 A108236 A002849
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Jan 19 2020
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)