login
A375801
Digits of composite k start as k', where k' is the arithmetic derivative of k.
0
1243, 40633, 43489, 132217, 132653, 163817, 355247, 356071, 356483, 356689, 1020403, 1021211, 1023433, 1024039, 1024241, 1025251, 1026059, 1026463, 1027069, 1027877, 1028281, 1029493, 4018657, 4086233, 4120399, 4236923, 4324963, 4348051, 4386749, 4468027, 4662677
OFFSET
1,1
COMMENTS
Prime numbers are not considered because any prime with 1 as MSD would be in the sequence.
EXAMPLE
1243'= 124; 40633' = 406; 355247' = 3552.
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Paolo P. Lava, Aug 29 2024
STATUS
approved