100004

Appears in sequences

• Numbers having four 0's in base 10.at n=12A043492
• Smallest k such that the concatenation 123...(k-1) k (k-1)...321 ( a concatenation of natural numbers from 1 to k and back to 1) is a multiple of prime(n), or 0 if no such number exists.at n=27A077187
• a(n) = A078296(n+1)/A078296(n).at n=4A078397
• Triangle, read by rows, in which the n-th row contains n smallest n-digit numbers.at n=19A081551
• 5-Smith numbers.at n=13A103126
• Not of the form n + [log_10 n].at n=5A123522
• Smallest number k not divisible by 10 such that k^2 contains exactly n zeros.at n=6A134845
• Indices of records in A064844.at n=15A135988
• a(n) = the smallest n-digit number with exactly 12 divisors, a(n) = 0 if no such number exists.at n=5A182683
• Number of tilings of a 18 X n rectangle using 2n nonominoes of shape I.at n=30A250666
• Expansion of Product_{k>=1} ((1+x^k) / ((1-x^(2*k-1)) * (1-x^(8*k-4)))).at n=36A280908
• "Inside numbers". Pick a term "t" and one of its digits "d". Now jump to the right over d digits if "d" is odd, and to the left over d digits if "d" is even. Whatever the "d" you choose, you will stay on "t".at n=39A284515
• Indices of Ulam prime triples, where u(k), u(k+1) and u(k+2) are all primes, and u(k) = A002858(k) are the Ulam numbers.at n=33A307330
• a(n) = smallest m such that A307629(m) = n.at n=25A307560