A324112 Odd numbers n for which A324108(n) = A324054(n-1), and which themselves are not powers of primes (in A000961).

87, 2091, 16683, 33215, 267179, 1066877, 1319235, 4228521, 4330579, 8668351, 9769751, 34662043, 35924003, 50892875, 68239949, 83920375, 143201615, 151730823, 311513495, 419564887, 537386921, 538253299, 539511051, 605140375

Offset

1,1

Comments

Odd terms > 1 in A324111.

Links

Table of n, a(n) for n=1..24.

Example

(Here f is A324054 and g is A324108).
87 is a term, as 87 = 3 * 29, f(3-1) = 4, f(29-1) = 156, and g(87) = 4 * 156 = 624 = f(87-1).
1066877 is a term, as 1066877 = 7^2 * 21773, f(49-1) = 133, f(21773-1) = 8035200, and g(1066877) = 133 * 8035200 = 1068681600 = f(1066877-1).
537386921 is a term, as 537386921 = 2083 * 257987, f(2083-1) = 1440, f(257987-1) = 31554095246856, and g(537386921) = 1440 * 31554095246856 = 45437897155472640 = f(537386921-1).

Crossrefs

Cf. A324111.

Sequence in context: A201154 A171344 A200533 * A116269 A017803 A017750

Adjacent sequences: A324109 A324110 A324111 * A324113 A324114 A324115

Keyword

nonn,more

Author

Antti Karttunen, Feb 16 2019

Status

approved