40300

Appears in sequences

• Hexagonal pyramidal numbers, or greengrocer's numbers.at n=39A002412
• Even hexagonal pyramidal numbers.at n=18A015226
• a(n) = n^2*(n^2+3)/4.at n=19A039623
• Numbers which can be expressed as the product of a number and its reversal in at least two different ways.at n=26A066531
• Partial sums of A051941.at n=24A136105
• Smallest sequence which lists the position of digits "3" in the sequence.at n=26A167453
• Non-palindromes whose squares are in A066531.at n=9A206642
• a(n) is the number of base-4 n-digit numbers requiring only binary digits in bases 3 and 4.at n=53A230360
• Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1312.at n=6A239378
• Number of length n+5 0..3 arrays with some three disjoint pairs in each consecutive six terms having the same sum.at n=20A248484
• Sequence A261220 shown in factorial base: a(n) = A007623(A261220(n)).at n=59A260743
• Number of minimal edge covers in the n-gear graph.at n=12A290762
• a(n) is the smallest number k such that k occurs in the Reverse-and-Multiply trajectories of exactly n positive integers less than k.at n=5A355550