200020

Appears in sequences

• Numbers k such that k^3 has only even digits.at n=32A052004
• n, n^2 and n^3 all use only even digits.at n=14A085586
• Numbers k such that k and k^2 use only the digits 0, 2, 3, 4 and 8.at n=41A136885
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 6 and 8.at n=46A136904
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 7 and 8.at n=52A136906
• Numbers k such that k and k^2 use only the digits 0, 2, 4 and 8.at n=24A136908
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 8 and 9.at n=48A136909
• Numbers whose decimal expansion contains only 0's and 2's.at n=34A169965
• Numbers k such that k^2 has only digits 0, 4 and 8.at n=28A202170
• Numbers k such that k and k^3 use only even digits.at n=19A353342
• a(n) is the number of tetrapods standing on the four edges of an n X n grid, so that no two feet are the same distance apart and no foot is on a corner. Tetrapods with congruent footprints are counted only once.at n=35A353447
• Numbers with as many zeros as the sum of their digits.at n=31A354410
• Modified Sisyphus function of order 5: a(n) is the concatenation of the number of digits in n with the number of digits of n congruent to k modulo 5 for each k from 0 to 4 in turn.at n=33A375208
• Modified Sisyphus function of order 5: a(n) is the concatenation of the number of digits in n with the number of digits of n congruent to k modulo 5 for each k from 0 to 4 in turn.at n=38A375208
• Lexicographically earliest sequence of distinct terms > 1 such that no term is a substring of the product of any two terms.at n=37A381242